once in every...oh...about 50 starts, for some reason, i start it, and then the car has a hell of a time running, but it stays running. Whenever i hit the gas to rev it up, it spudders and backfires a few times. after a few minutes of warming up, it stops. what gives? it throws the codes 32, and also 34.

i think that the 34 is from me having no muffler and the lack of backpressure. it has a new fuel filter i just put in last weekend. i cant seem to figure it out cuz it happens only every so often.

 

Intermitant problems are a pain in the a$$. Is your ride F/I or carbed? I would check all your wire connectors and Vac lines. Does the weather seem to have an adverse affect on your car? I would note the conditions of next time this happens Weather, Vehicle Temp Etc. Hope this helps later

 

Do you think maybe your backpressure sensor is busted?

 

its a 305 TPI auto, weather doesnt seem to affect it, all vac lines check, same with wires, usually the car is started from cold, i havent ever had the problem when the car was warm, well, actaully, i have, a few times the engine was warm.

im not sure about the back pressure cuz i dont have a muffler in it. i thought maybe thats what was throwing the codes. what else can i do?

 

Sorry, I was kidding. There is no backpressure sensor. Having no muffler could not cause a trouble code.

32 is an EGR code, while 34 is a MAF code. 34 is likely caused by a failing MAF burnoff relay(and therefore dirty hot wire inside the sensor) and is likely the source of your running problem. The relay is made to burn off dirt/dust that coats the wire inside the sensor, failure to do that will result in the sensor being less sensitive, reading lower voltage(and higher vacuum, or more air) than it should. Could also be a failing MAF sensor or MAF power relay perhaps, but I'd replace the relay(s) before the sensor for sure.

Next time it happens, remove the MAF sensor and clean it with something like throttle body cleaner, let it dry thoroughly, and try to restart. Disconnect your battery for a few minutes to dispose of the old trouble codes.

 

What year is the 305? If it's a '90 or newer, it won't have a MAF, but a MAP sensor in stead. The diagnosis would be a little different in that case.

 

1988

 

That would be a MAF system.

Since teh problem is intermittent, there are a few possibilities. You may have a failing contact in teh MAF power relay, an intermittent connection at the MAF, a fractured MAF sensing hot wire, leakage in the intake dustwork, a TPS that is misadjusted, and several other more obscure possibilities.

Just to eliminate the possibility, try exchanging the MAF power and burn off relays. If the problem disappears, the relay that was supplying power is failing.

 

Hmmm... I'm gonna put my 2 bits on a sticking egr and possibly aIAC all crudded up. I would check on the MAF system as well due to the SES code particularly since it happens on both a cold motor as well as a warm.

 

lol..

 

Josh,


Have you ever cleaned off your IAC valve? and also I used to have that problem and it was my MAF burnoff wire(code 34) I have to take my maf wires off and put a new end on it.

lemme know if ya need help

Josh